50-Pack Mini Micro Limit Switch Roller Lever SPDT Snap Action
50-Pack Mini Micro Limit Switch Roller Lever SPDT Snap Action
50-Pack Mini Micro Limit Switch with Roller Lever – SPDT Snap Action
Get reliable, consistent switching performance with this bulk pack of 50 mini micro limit switches. Featuring a Single Pole Double Throw (SPDT) snap action mechanism and a hinge roller lever actuator, these compact switches are ideal for electronics projects, appliance controls, and automation applications.
Key Specifications
- Contact Type: SPDT – 1 Normally Open (NO), 1 Normally Closed (NC), 1 Common (COM)
- Voltage & Current Rating: AC 125V / 5A
- Action Type: Momentary snap action
- Actuator Type: Hinge roller lever
- Terminal Type: 3-pin
- Overall Size (pins not included): 20 × 6 × 10 mm (L × W × H)
- Hinge Roller Lever Length: 18 mm / 0.7 inch
- Roller Diameter: 4.5 mm / 0.2 inch
- Mounting Hole Diameter: 2 mm / 0.08 inch
- Mounting Hole Spacing: 9 mm / 0.35 inch
- Material: Plastic & Metal
- Color: Black, Red, Silver Tone
- Net Weight: 110 g (full pack)
- Quantity: 50 switches per pack
- EU LVD Compliance: Low voltage — below 50V AC or 75V DC
How Snap Action Contacts Work
The snap action mechanism applies force to an over-center mechanism as the actuator moves. When the trip point is reached, this creates a rapid change in contact state. Reversing actuator motion to the reset point snaps the contacts back to their original position. This differential between trip and reset points (also called hysteresis or travel to reset) helps prevent false triggering caused by vibration. The result is repeatable, dependable performance — even with slow-moving actuators — and contact travel is independent of actuator travel distance.
Common Applications
- Microwave oven door interlocks (N/O or N/C)
- Refrigerator and appliance door detection
- 3D printer end stops and CNC limit positions
- Robotics, automation, and DIY electronics
- Industrial control panels and machinery
What's in the Box
- 50 × Mini Micro Limit Switch (Roller Lever, SPDT, Snap Action)
Made in Mainland China.
Note: Due to lighting and display variations, colors in product images may appear slightly different from the actual item. Measurement tolerance is ±1–3 mm.
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What does SPDT mean on these micro limit switches?
A: SPDT stands for Single Pole Double Throw. Each switch has three terminals — one Common (COM), one Normally Open (NO), and one Normally Closed (NC). This allows the switch to either open or close a circuit depending on the actuator position, making it highly versatile for a wide range of control and automation applications.
Q: Are these micro limit switches compatible with 3D printers and CNC machines?
A: Yes! These mini roller lever micro switches are widely used as end stops on 3D printers and limit switches on CNC routers and similar machines. Their compact 20 × 6 × 10 mm footprint and standard 2 mm mounting holes make them easy to install in tight spaces. The snap action mechanism ensures precise, repeatable triggering for accurate positioning.
Q: What is the maximum voltage and current rating for these switches?
A: These micro limit switches are rated for AC 125V at 5A. They also comply with EU Low Voltage Directive (LVD) requirements for voltages below 50V AC or 75V DC, making them suitable for a broad range of low- to mid-voltage electronic and appliance applications.
Q: How do I mount these mini micro switches?
A: Each switch features two mounting holes with a 2 mm diameter and 9 mm center-to-center spacing. Simply use M2 screws (not included) to secure the switch to your panel, chassis, or bracket. The 3-pin solder or spade terminals allow straightforward wiring to your circuit.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.